<p>Gilbert Strang is the only reason I somewhat understand linear algebra after taking the course with a terrible professor and an even more useless textbook. That said, you get the most out of the OCW by internalizing the information, that means problem solving. So if you really want to make the material stick to your brain, grab a textbook and start applying the lecture material. Ideally you could use the same textbook and assigned problems as the students who originally took class.</p>